A reveal trailer has been released for upcoming Switch title Koral, a puzzle game interestingly developed entirely at sea.

Described by its creator as "a love letter to the ocean", Koral has players diving into the beautiful underwater world, solving puzzles to bring life back to coral reefs. You can flow anywhere you like to find new ways to transport healing energy for other corals, and you can watch in realtime how the seafloor becomes more colourful and vibrant as you progress.

The game's puzzle mechanics come via interactions with various coral species and underwater life. The puzzling appears to be rather light, with the game doubling up as a way for you to learn about the sea and gather up collectables. The trailer above gives us a glimpse of its gameplay in action, but you can also check out the main menu and its music down below.

Koral launches on Switch on 16th May for $11.99; as we mentioned previously, a 'Making Of' video will also be released on the same day to show how the game was developed on a boat at sea. Make sure to keep an eye out for that if you're interested.